1 /* 2 * qemu user main 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "qemu-common.h" 22 #include "qemu/units.h" 23 #include "qemu/accel.h" 24 #include "sysemu/tcg.h" 25 #include "qemu-version.h" 26 #include <machine/trap.h> 27 28 #include "qapi/error.h" 29 #include "qemu.h" 30 #include "qemu/config-file.h" 31 #include "qemu/error-report.h" 32 #include "qemu/path.h" 33 #include "qemu/help_option.h" 34 #include "qemu/module.h" 35 #include "cpu.h" 36 #include "exec/exec-all.h" 37 #include "tcg/tcg.h" 38 #include "qemu/timer.h" 39 #include "qemu/envlist.h" 40 #include "exec/log.h" 41 #include "trace/control.h" 42 43 int singlestep; 44 unsigned long mmap_min_addr; 45 unsigned long guest_base; 46 bool have_guest_base; 47 unsigned long reserved_va; 48 49 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; 50 const char *qemu_uname_release; 51 extern char **environ; 52 enum BSDType bsd_type; 53 54 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so 55 we allocate a bigger stack. Need a better solution, for example 56 by remapping the process stack directly at the right place */ 57 unsigned long x86_stack_size = 512 * 1024; 58 59 void gemu_log(const char *fmt, ...) 60 { 61 va_list ap; 62 63 va_start(ap, fmt); 64 vfprintf(stderr, fmt, ap); 65 va_end(ap); 66 } 67 68 #if defined(TARGET_I386) 69 int cpu_get_pic_interrupt(CPUX86State *env) 70 { 71 return -1; 72 } 73 #endif 74 75 void fork_start(void) 76 { 77 } 78 79 void fork_end(int child) 80 { 81 if (child) { 82 gdbserver_fork(thread_cpu); 83 } 84 } 85 86 #ifdef TARGET_I386 87 /***********************************************************/ 88 /* CPUX86 core interface */ 89 90 uint64_t cpu_get_tsc(CPUX86State *env) 91 { 92 return cpu_get_host_ticks(); 93 } 94 95 static void write_dt(void *ptr, unsigned long addr, unsigned long limit, 96 int flags) 97 { 98 unsigned int e1, e2; 99 uint32_t *p; 100 e1 = (addr << 16) | (limit & 0xffff); 101 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000); 102 e2 |= flags; 103 p = ptr; 104 p[0] = tswap32(e1); 105 p[1] = tswap32(e2); 106 } 107 108 static uint64_t *idt_table; 109 #ifdef TARGET_X86_64 110 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl, 111 uint64_t addr, unsigned int sel) 112 { 113 uint32_t *p, e1, e2; 114 e1 = (addr & 0xffff) | (sel << 16); 115 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 116 p = ptr; 117 p[0] = tswap32(e1); 118 p[1] = tswap32(e2); 119 p[2] = tswap32(addr >> 32); 120 p[3] = 0; 121 } 122 /* only dpl matters as we do only user space emulation */ 123 static void set_idt(int n, unsigned int dpl) 124 { 125 set_gate64(idt_table + n * 2, 0, dpl, 0, 0); 126 } 127 #else 128 static void set_gate(void *ptr, unsigned int type, unsigned int dpl, 129 uint32_t addr, unsigned int sel) 130 { 131 uint32_t *p, e1, e2; 132 e1 = (addr & 0xffff) | (sel << 16); 133 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 134 p = ptr; 135 p[0] = tswap32(e1); 136 p[1] = tswap32(e2); 137 } 138 139 /* only dpl matters as we do only user space emulation */ 140 static void set_idt(int n, unsigned int dpl) 141 { 142 set_gate(idt_table + n, 0, dpl, 0, 0); 143 } 144 #endif 145 146 void cpu_loop(CPUX86State *env) 147 { 148 CPUState *cs = env_cpu(env); 149 int trapnr; 150 abi_ulong pc; 151 //target_siginfo_t info; 152 153 for(;;) { 154 cpu_exec_start(cs); 155 trapnr = cpu_exec(cs); 156 cpu_exec_end(cs); 157 process_queued_cpu_work(cs); 158 159 switch(trapnr) { 160 case 0x80: 161 /* syscall from int $0x80 */ 162 if (bsd_type == target_freebsd) { 163 abi_ulong params = (abi_ulong) env->regs[R_ESP] + 164 sizeof(int32_t); 165 int32_t syscall_nr = env->regs[R_EAX]; 166 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8; 167 168 if (syscall_nr == TARGET_FREEBSD_NR_syscall) { 169 get_user_s32(syscall_nr, params); 170 params += sizeof(int32_t); 171 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) { 172 get_user_s32(syscall_nr, params); 173 params += sizeof(int64_t); 174 } 175 get_user_s32(arg1, params); 176 params += sizeof(int32_t); 177 get_user_s32(arg2, params); 178 params += sizeof(int32_t); 179 get_user_s32(arg3, params); 180 params += sizeof(int32_t); 181 get_user_s32(arg4, params); 182 params += sizeof(int32_t); 183 get_user_s32(arg5, params); 184 params += sizeof(int32_t); 185 get_user_s32(arg6, params); 186 params += sizeof(int32_t); 187 get_user_s32(arg7, params); 188 params += sizeof(int32_t); 189 get_user_s32(arg8, params); 190 env->regs[R_EAX] = do_freebsd_syscall(env, 191 syscall_nr, 192 arg1, 193 arg2, 194 arg3, 195 arg4, 196 arg5, 197 arg6, 198 arg7, 199 arg8); 200 } else { //if (bsd_type == target_openbsd) 201 env->regs[R_EAX] = do_openbsd_syscall(env, 202 env->regs[R_EAX], 203 env->regs[R_EBX], 204 env->regs[R_ECX], 205 env->regs[R_EDX], 206 env->regs[R_ESI], 207 env->regs[R_EDI], 208 env->regs[R_EBP]); 209 } 210 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 211 env->regs[R_EAX] = -env->regs[R_EAX]; 212 env->eflags |= CC_C; 213 } else { 214 env->eflags &= ~CC_C; 215 } 216 break; 217 #ifndef TARGET_ABI32 218 case EXCP_SYSCALL: 219 /* syscall from syscall instruction */ 220 if (bsd_type == target_freebsd) 221 env->regs[R_EAX] = do_freebsd_syscall(env, 222 env->regs[R_EAX], 223 env->regs[R_EDI], 224 env->regs[R_ESI], 225 env->regs[R_EDX], 226 env->regs[R_ECX], 227 env->regs[8], 228 env->regs[9], 0, 0); 229 else { //if (bsd_type == target_openbsd) 230 env->regs[R_EAX] = do_openbsd_syscall(env, 231 env->regs[R_EAX], 232 env->regs[R_EDI], 233 env->regs[R_ESI], 234 env->regs[R_EDX], 235 env->regs[10], 236 env->regs[8], 237 env->regs[9]); 238 } 239 env->eip = env->exception_next_eip; 240 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 241 env->regs[R_EAX] = -env->regs[R_EAX]; 242 env->eflags |= CC_C; 243 } else { 244 env->eflags &= ~CC_C; 245 } 246 break; 247 #endif 248 #if 0 249 case EXCP0B_NOSEG: 250 case EXCP0C_STACK: 251 info.si_signo = SIGBUS; 252 info.si_errno = 0; 253 info.si_code = TARGET_SI_KERNEL; 254 info._sifields._sigfault._addr = 0; 255 queue_signal(env, info.si_signo, &info); 256 break; 257 case EXCP0D_GPF: 258 /* XXX: potential problem if ABI32 */ 259 #ifndef TARGET_X86_64 260 if (env->eflags & VM_MASK) { 261 handle_vm86_fault(env); 262 } else 263 #endif 264 { 265 info.si_signo = SIGSEGV; 266 info.si_errno = 0; 267 info.si_code = TARGET_SI_KERNEL; 268 info._sifields._sigfault._addr = 0; 269 queue_signal(env, info.si_signo, &info); 270 } 271 break; 272 case EXCP0E_PAGE: 273 info.si_signo = SIGSEGV; 274 info.si_errno = 0; 275 if (!(env->error_code & 1)) 276 info.si_code = TARGET_SEGV_MAPERR; 277 else 278 info.si_code = TARGET_SEGV_ACCERR; 279 info._sifields._sigfault._addr = env->cr[2]; 280 queue_signal(env, info.si_signo, &info); 281 break; 282 case EXCP00_DIVZ: 283 #ifndef TARGET_X86_64 284 if (env->eflags & VM_MASK) { 285 handle_vm86_trap(env, trapnr); 286 } else 287 #endif 288 { 289 /* division by zero */ 290 info.si_signo = SIGFPE; 291 info.si_errno = 0; 292 info.si_code = TARGET_FPE_INTDIV; 293 info._sifields._sigfault._addr = env->eip; 294 queue_signal(env, info.si_signo, &info); 295 } 296 break; 297 case EXCP01_DB: 298 case EXCP03_INT3: 299 #ifndef TARGET_X86_64 300 if (env->eflags & VM_MASK) { 301 handle_vm86_trap(env, trapnr); 302 } else 303 #endif 304 { 305 info.si_signo = SIGTRAP; 306 info.si_errno = 0; 307 if (trapnr == EXCP01_DB) { 308 info.si_code = TARGET_TRAP_BRKPT; 309 info._sifields._sigfault._addr = env->eip; 310 } else { 311 info.si_code = TARGET_SI_KERNEL; 312 info._sifields._sigfault._addr = 0; 313 } 314 queue_signal(env, info.si_signo, &info); 315 } 316 break; 317 case EXCP04_INTO: 318 case EXCP05_BOUND: 319 #ifndef TARGET_X86_64 320 if (env->eflags & VM_MASK) { 321 handle_vm86_trap(env, trapnr); 322 } else 323 #endif 324 { 325 info.si_signo = SIGSEGV; 326 info.si_errno = 0; 327 info.si_code = TARGET_SI_KERNEL; 328 info._sifields._sigfault._addr = 0; 329 queue_signal(env, info.si_signo, &info); 330 } 331 break; 332 case EXCP06_ILLOP: 333 info.si_signo = SIGILL; 334 info.si_errno = 0; 335 info.si_code = TARGET_ILL_ILLOPN; 336 info._sifields._sigfault._addr = env->eip; 337 queue_signal(env, info.si_signo, &info); 338 break; 339 #endif 340 case EXCP_INTERRUPT: 341 /* just indicate that signals should be handled asap */ 342 break; 343 #if 0 344 case EXCP_DEBUG: 345 { 346 int sig; 347 348 sig = gdb_handlesig (env, TARGET_SIGTRAP); 349 if (sig) 350 { 351 info.si_signo = sig; 352 info.si_errno = 0; 353 info.si_code = TARGET_TRAP_BRKPT; 354 queue_signal(env, info.si_signo, &info); 355 } 356 } 357 break; 358 #endif 359 default: 360 pc = env->segs[R_CS].base + env->eip; 361 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n", 362 (long)pc, trapnr); 363 abort(); 364 } 365 process_pending_signals(env); 366 } 367 } 368 #endif 369 370 #ifdef TARGET_SPARC 371 #define SPARC64_STACK_BIAS 2047 372 373 //#define DEBUG_WIN 374 /* WARNING: dealing with register windows _is_ complicated. More info 375 can be found at http://www.sics.se/~psm/sparcstack.html */ 376 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index) 377 { 378 index = (index + cwp * 16) % (16 * env->nwindows); 379 /* wrap handling : if cwp is on the last window, then we use the 380 registers 'after' the end */ 381 if (index < 8 && env->cwp == env->nwindows - 1) 382 index += 16 * env->nwindows; 383 return index; 384 } 385 386 /* save the register window 'cwp1' */ 387 static inline void save_window_offset(CPUSPARCState *env, int cwp1) 388 { 389 unsigned int i; 390 abi_ulong sp_ptr; 391 392 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 393 #ifdef TARGET_SPARC64 394 if (sp_ptr & 3) 395 sp_ptr += SPARC64_STACK_BIAS; 396 #endif 397 #if defined(DEBUG_WIN) 398 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n", 399 sp_ptr, cwp1); 400 #endif 401 for(i = 0; i < 16; i++) { 402 /* FIXME - what to do if put_user() fails? */ 403 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 404 sp_ptr += sizeof(abi_ulong); 405 } 406 } 407 408 static void save_window(CPUSPARCState *env) 409 { 410 #ifndef TARGET_SPARC64 411 unsigned int new_wim; 412 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) & 413 ((1LL << env->nwindows) - 1); 414 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 415 env->wim = new_wim; 416 #else 417 /* 418 * cansave is zero if the spill trap handler is triggered by `save` and 419 * nonzero if triggered by a `flushw` 420 */ 421 save_window_offset(env, cpu_cwp_dec(env, env->cwp - env->cansave - 2)); 422 env->cansave++; 423 env->canrestore--; 424 #endif 425 } 426 427 static void restore_window(CPUSPARCState *env) 428 { 429 #ifndef TARGET_SPARC64 430 unsigned int new_wim; 431 #endif 432 unsigned int i, cwp1; 433 abi_ulong sp_ptr; 434 435 #ifndef TARGET_SPARC64 436 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) & 437 ((1LL << env->nwindows) - 1); 438 #endif 439 440 /* restore the invalid window */ 441 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 442 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 443 #ifdef TARGET_SPARC64 444 if (sp_ptr & 3) 445 sp_ptr += SPARC64_STACK_BIAS; 446 #endif 447 #if defined(DEBUG_WIN) 448 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n", 449 sp_ptr, cwp1); 450 #endif 451 for(i = 0; i < 16; i++) { 452 /* FIXME - what to do if get_user() fails? */ 453 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 454 sp_ptr += sizeof(abi_ulong); 455 } 456 #ifdef TARGET_SPARC64 457 env->canrestore++; 458 if (env->cleanwin < env->nwindows - 1) 459 env->cleanwin++; 460 env->cansave--; 461 #else 462 env->wim = new_wim; 463 #endif 464 } 465 466 static void flush_windows(CPUSPARCState *env) 467 { 468 int offset, cwp1; 469 470 offset = 1; 471 for(;;) { 472 /* if restore would invoke restore_window(), then we can stop */ 473 cwp1 = cpu_cwp_inc(env, env->cwp + offset); 474 #ifndef TARGET_SPARC64 475 if (env->wim & (1 << cwp1)) 476 break; 477 #else 478 if (env->canrestore == 0) 479 break; 480 env->cansave++; 481 env->canrestore--; 482 #endif 483 save_window_offset(env, cwp1); 484 offset++; 485 } 486 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 487 #ifndef TARGET_SPARC64 488 /* set wim so that restore will reload the registers */ 489 env->wim = 1 << cwp1; 490 #endif 491 #if defined(DEBUG_WIN) 492 printf("flush_windows: nb=%d\n", offset - 1); 493 #endif 494 } 495 496 void cpu_loop(CPUSPARCState *env) 497 { 498 CPUState *cs = env_cpu(env); 499 int trapnr, ret, syscall_nr; 500 //target_siginfo_t info; 501 502 while (1) { 503 cpu_exec_start(cs); 504 trapnr = cpu_exec(cs); 505 cpu_exec_end(cs); 506 process_queued_cpu_work(cs); 507 508 switch (trapnr) { 509 #ifndef TARGET_SPARC64 510 case 0x80: 511 #else 512 /* FreeBSD uses 0x141 for syscalls too */ 513 case 0x141: 514 if (bsd_type != target_freebsd) 515 goto badtrap; 516 /* fallthrough */ 517 case 0x100: 518 #endif 519 syscall_nr = env->gregs[1]; 520 if (bsd_type == target_freebsd) 521 ret = do_freebsd_syscall(env, syscall_nr, 522 env->regwptr[0], env->regwptr[1], 523 env->regwptr[2], env->regwptr[3], 524 env->regwptr[4], env->regwptr[5], 0, 0); 525 else if (bsd_type == target_netbsd) 526 ret = do_netbsd_syscall(env, syscall_nr, 527 env->regwptr[0], env->regwptr[1], 528 env->regwptr[2], env->regwptr[3], 529 env->regwptr[4], env->regwptr[5]); 530 else { //if (bsd_type == target_openbsd) 531 #if defined(TARGET_SPARC64) 532 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG | 533 TARGET_OPENBSD_SYSCALL_G2RFLAG); 534 #endif 535 ret = do_openbsd_syscall(env, syscall_nr, 536 env->regwptr[0], env->regwptr[1], 537 env->regwptr[2], env->regwptr[3], 538 env->regwptr[4], env->regwptr[5]); 539 } 540 if ((unsigned int)ret >= (unsigned int)(-515)) { 541 ret = -ret; 542 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 543 env->xcc |= PSR_CARRY; 544 #else 545 env->psr |= PSR_CARRY; 546 #endif 547 } else { 548 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 549 env->xcc &= ~PSR_CARRY; 550 #else 551 env->psr &= ~PSR_CARRY; 552 #endif 553 } 554 env->regwptr[0] = ret; 555 /* next instruction */ 556 #if defined(TARGET_SPARC64) 557 if (bsd_type == target_openbsd && 558 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) { 559 env->pc = env->gregs[2]; 560 env->npc = env->pc + 4; 561 } else if (bsd_type == target_openbsd && 562 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) { 563 env->pc = env->gregs[7]; 564 env->npc = env->pc + 4; 565 } else { 566 env->pc = env->npc; 567 env->npc = env->npc + 4; 568 } 569 #else 570 env->pc = env->npc; 571 env->npc = env->npc + 4; 572 #endif 573 break; 574 case 0x83: /* flush windows */ 575 #ifdef TARGET_ABI32 576 case 0x103: 577 #endif 578 flush_windows(env); 579 /* next instruction */ 580 env->pc = env->npc; 581 env->npc = env->npc + 4; 582 break; 583 #ifndef TARGET_SPARC64 584 case TT_WIN_OVF: /* window overflow */ 585 save_window(env); 586 break; 587 case TT_WIN_UNF: /* window underflow */ 588 restore_window(env); 589 break; 590 case TT_TFAULT: 591 case TT_DFAULT: 592 #if 0 593 { 594 info.si_signo = SIGSEGV; 595 info.si_errno = 0; 596 /* XXX: check env->error_code */ 597 info.si_code = TARGET_SEGV_MAPERR; 598 info._sifields._sigfault._addr = env->mmuregs[4]; 599 queue_signal(env, info.si_signo, &info); 600 } 601 #endif 602 break; 603 #else 604 case TT_SPILL: /* window overflow */ 605 save_window(env); 606 break; 607 case TT_FILL: /* window underflow */ 608 restore_window(env); 609 break; 610 case TT_TFAULT: 611 case TT_DFAULT: 612 #if 0 613 { 614 info.si_signo = SIGSEGV; 615 info.si_errno = 0; 616 /* XXX: check env->error_code */ 617 info.si_code = TARGET_SEGV_MAPERR; 618 if (trapnr == TT_DFAULT) 619 info._sifields._sigfault._addr = env->dmmuregs[4]; 620 else 621 info._sifields._sigfault._addr = env->tsptr->tpc; 622 //queue_signal(env, info.si_signo, &info); 623 } 624 #endif 625 break; 626 #endif 627 case EXCP_INTERRUPT: 628 /* just indicate that signals should be handled asap */ 629 break; 630 case EXCP_DEBUG: 631 { 632 #if 0 633 int sig = 634 #endif 635 gdb_handlesig(cs, TARGET_SIGTRAP); 636 #if 0 637 if (sig) 638 { 639 info.si_signo = sig; 640 info.si_errno = 0; 641 info.si_code = TARGET_TRAP_BRKPT; 642 //queue_signal(env, info.si_signo, &info); 643 } 644 #endif 645 } 646 break; 647 default: 648 #ifdef TARGET_SPARC64 649 badtrap: 650 #endif 651 printf ("Unhandled trap: 0x%x\n", trapnr); 652 cpu_dump_state(cs, stderr, 0); 653 exit (1); 654 } 655 process_pending_signals (env); 656 } 657 } 658 659 #endif 660 661 static void usage(void) 662 { 663 printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION 664 "\n" QEMU_COPYRIGHT "\n" 665 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" 666 "BSD CPU emulator (compiled for %s emulation)\n" 667 "\n" 668 "Standard options:\n" 669 "-h print this help\n" 670 "-g port wait gdb connection to port\n" 671 "-L path set the elf interpreter prefix (default=%s)\n" 672 "-s size set the stack size in bytes (default=%ld)\n" 673 "-cpu model select CPU (-cpu help for list)\n" 674 "-drop-ld-preload drop LD_PRELOAD for target process\n" 675 "-E var=value sets/modifies targets environment variable(s)\n" 676 "-U var unsets targets environment variable(s)\n" 677 "-B address set guest_base address to address\n" 678 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n" 679 "\n" 680 "Debug options:\n" 681 "-d item1[,...] enable logging of specified items\n" 682 " (use '-d help' for a list of log items)\n" 683 "-D logfile write logs to 'logfile' (default stderr)\n" 684 "-p pagesize set the host page size to 'pagesize'\n" 685 "-singlestep always run in singlestep mode\n" 686 "-strace log system calls\n" 687 "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 688 " specify tracing options\n" 689 "\n" 690 "Environment variables:\n" 691 "QEMU_STRACE Print system calls and arguments similar to the\n" 692 " 'strace' program. Enable by setting to any value.\n" 693 "You can use -E and -U options to set/unset environment variables\n" 694 "for target process. It is possible to provide several variables\n" 695 "by repeating the option. For example:\n" 696 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" 697 "Note that if you provide several changes to single variable\n" 698 "last change will stay in effect.\n" 699 "\n" 700 QEMU_HELP_BOTTOM "\n" 701 , 702 TARGET_NAME, 703 interp_prefix, 704 x86_stack_size); 705 exit(1); 706 } 707 708 THREAD CPUState *thread_cpu; 709 710 bool qemu_cpu_is_self(CPUState *cpu) 711 { 712 return thread_cpu == cpu; 713 } 714 715 void qemu_cpu_kick(CPUState *cpu) 716 { 717 cpu_exit(cpu); 718 } 719 720 /* Assumes contents are already zeroed. */ 721 void init_task_state(TaskState *ts) 722 { 723 int i; 724 725 ts->used = 1; 726 ts->first_free = ts->sigqueue_table; 727 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) { 728 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1]; 729 } 730 ts->sigqueue_table[i].next = NULL; 731 } 732 733 int main(int argc, char **argv) 734 { 735 const char *filename; 736 const char *cpu_model; 737 const char *cpu_type; 738 const char *log_file = NULL; 739 const char *log_mask = NULL; 740 struct target_pt_regs regs1, *regs = ®s1; 741 struct image_info info1, *info = &info1; 742 TaskState ts1, *ts = &ts1; 743 CPUArchState *env; 744 CPUState *cpu; 745 int optind; 746 const char *r; 747 const char *gdbstub = NULL; 748 char **target_environ, **wrk; 749 envlist_t *envlist = NULL; 750 bsd_type = target_openbsd; 751 752 if (argc <= 1) 753 usage(); 754 755 error_init(argv[0]); 756 module_call_init(MODULE_INIT_TRACE); 757 qemu_init_cpu_list(); 758 module_call_init(MODULE_INIT_QOM); 759 760 envlist = envlist_create(); 761 762 /* add current environment into the list */ 763 for (wrk = environ; *wrk != NULL; wrk++) { 764 (void) envlist_setenv(envlist, *wrk); 765 } 766 767 cpu_model = NULL; 768 769 qemu_add_opts(&qemu_trace_opts); 770 771 optind = 1; 772 for (;;) { 773 if (optind >= argc) 774 break; 775 r = argv[optind]; 776 if (r[0] != '-') 777 break; 778 optind++; 779 r++; 780 if (!strcmp(r, "-")) { 781 break; 782 } else if (!strcmp(r, "d")) { 783 if (optind >= argc) { 784 break; 785 } 786 log_mask = argv[optind++]; 787 } else if (!strcmp(r, "D")) { 788 if (optind >= argc) { 789 break; 790 } 791 log_file = argv[optind++]; 792 } else if (!strcmp(r, "E")) { 793 r = argv[optind++]; 794 if (envlist_setenv(envlist, r) != 0) 795 usage(); 796 } else if (!strcmp(r, "ignore-environment")) { 797 envlist_free(envlist); 798 envlist = envlist_create(); 799 } else if (!strcmp(r, "U")) { 800 r = argv[optind++]; 801 if (envlist_unsetenv(envlist, r) != 0) 802 usage(); 803 } else if (!strcmp(r, "s")) { 804 r = argv[optind++]; 805 x86_stack_size = strtol(r, (char **)&r, 0); 806 if (x86_stack_size <= 0) 807 usage(); 808 if (*r == 'M') 809 x86_stack_size *= MiB; 810 else if (*r == 'k' || *r == 'K') 811 x86_stack_size *= KiB; 812 } else if (!strcmp(r, "L")) { 813 interp_prefix = argv[optind++]; 814 } else if (!strcmp(r, "p")) { 815 qemu_host_page_size = atoi(argv[optind++]); 816 if (qemu_host_page_size == 0 || 817 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { 818 fprintf(stderr, "page size must be a power of two\n"); 819 exit(1); 820 } 821 } else if (!strcmp(r, "g")) { 822 gdbstub = g_strdup(argv[optind++]); 823 } else if (!strcmp(r, "r")) { 824 qemu_uname_release = argv[optind++]; 825 } else if (!strcmp(r, "cpu")) { 826 cpu_model = argv[optind++]; 827 if (is_help_option(cpu_model)) { 828 /* XXX: implement xxx_cpu_list for targets that still miss it */ 829 #if defined(cpu_list) 830 cpu_list(); 831 #endif 832 exit(1); 833 } 834 } else if (!strcmp(r, "B")) { 835 guest_base = strtol(argv[optind++], NULL, 0); 836 have_guest_base = true; 837 } else if (!strcmp(r, "drop-ld-preload")) { 838 (void) envlist_unsetenv(envlist, "LD_PRELOAD"); 839 } else if (!strcmp(r, "bsd")) { 840 if (!strcasecmp(argv[optind], "freebsd")) { 841 bsd_type = target_freebsd; 842 } else if (!strcasecmp(argv[optind], "netbsd")) { 843 bsd_type = target_netbsd; 844 } else if (!strcasecmp(argv[optind], "openbsd")) { 845 bsd_type = target_openbsd; 846 } else { 847 usage(); 848 } 849 optind++; 850 } else if (!strcmp(r, "singlestep")) { 851 singlestep = 1; 852 } else if (!strcmp(r, "strace")) { 853 do_strace = 1; 854 } else if (!strcmp(r, "trace")) { 855 trace_opt_parse(optarg); 856 } else { 857 usage(); 858 } 859 } 860 861 /* init debug */ 862 qemu_log_needs_buffers(); 863 qemu_set_log_filename(log_file, &error_fatal); 864 if (log_mask) { 865 int mask; 866 867 mask = qemu_str_to_log_mask(log_mask); 868 if (!mask) { 869 qemu_print_log_usage(stdout); 870 exit(1); 871 } 872 qemu_set_log(mask); 873 } 874 875 if (optind >= argc) { 876 usage(); 877 } 878 filename = argv[optind]; 879 880 if (!trace_init_backends()) { 881 exit(1); 882 } 883 trace_init_file(); 884 885 /* Zero out regs */ 886 memset(regs, 0, sizeof(struct target_pt_regs)); 887 888 /* Zero out image_info */ 889 memset(info, 0, sizeof(struct image_info)); 890 891 /* Scan interp_prefix dir for replacement files. */ 892 init_paths(interp_prefix); 893 894 if (cpu_model == NULL) { 895 #if defined(TARGET_I386) 896 #ifdef TARGET_X86_64 897 cpu_model = "qemu64"; 898 #else 899 cpu_model = "qemu32"; 900 #endif 901 #elif defined(TARGET_SPARC) 902 #ifdef TARGET_SPARC64 903 cpu_model = "TI UltraSparc II"; 904 #else 905 cpu_model = "Fujitsu MB86904"; 906 #endif 907 #else 908 cpu_model = "any"; 909 #endif 910 } 911 912 cpu_type = parse_cpu_option(cpu_model); 913 /* init tcg before creating CPUs and to get qemu_host_page_size */ 914 { 915 AccelClass *ac = ACCEL_GET_CLASS(current_accel()); 916 917 ac->init_machine(NULL); 918 accel_init_interfaces(ac); 919 } 920 cpu = cpu_create(cpu_type); 921 env = cpu->env_ptr; 922 #if defined(TARGET_SPARC) || defined(TARGET_PPC) 923 cpu_reset(cpu); 924 #endif 925 thread_cpu = cpu; 926 927 if (getenv("QEMU_STRACE")) { 928 do_strace = 1; 929 } 930 931 target_environ = envlist_to_environ(envlist, NULL); 932 envlist_free(envlist); 933 934 /* 935 * Now that page sizes are configured in tcg_exec_init() we can do 936 * proper page alignment for guest_base. 937 */ 938 guest_base = HOST_PAGE_ALIGN(guest_base); 939 940 /* 941 * Read in mmap_min_addr kernel parameter. This value is used 942 * When loading the ELF image to determine whether guest_base 943 * is needed. 944 * 945 * When user has explicitly set the quest base, we skip this 946 * test. 947 */ 948 if (!have_guest_base) { 949 FILE *fp; 950 951 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { 952 unsigned long tmp; 953 if (fscanf(fp, "%lu", &tmp) == 1) { 954 mmap_min_addr = tmp; 955 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr); 956 } 957 fclose(fp); 958 } 959 } 960 961 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) { 962 printf("Error loading %s\n", filename); 963 _exit(1); 964 } 965 966 for (wrk = target_environ; *wrk; wrk++) { 967 g_free(*wrk); 968 } 969 970 g_free(target_environ); 971 972 if (qemu_loglevel_mask(CPU_LOG_PAGE)) { 973 qemu_log("guest_base 0x%lx\n", guest_base); 974 log_page_dump("binary load"); 975 976 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); 977 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); 978 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", 979 info->start_code); 980 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", 981 info->start_data); 982 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); 983 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", 984 info->start_stack); 985 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); 986 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); 987 } 988 989 target_set_brk(info->brk); 990 syscall_init(); 991 signal_init(); 992 993 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay 994 generating the prologue until now so that the prologue can take 995 the real value of GUEST_BASE into account. */ 996 tcg_prologue_init(tcg_ctx); 997 tcg_region_init(); 998 999 /* build Task State */ 1000 memset(ts, 0, sizeof(TaskState)); 1001 init_task_state(ts); 1002 ts->info = info; 1003 cpu->opaque = ts; 1004 1005 #if defined(TARGET_I386) 1006 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; 1007 env->hflags |= HF_PE_MASK | HF_CPL_MASK; 1008 if (env->features[FEAT_1_EDX] & CPUID_SSE) { 1009 env->cr[4] |= CR4_OSFXSR_MASK; 1010 env->hflags |= HF_OSFXSR_MASK; 1011 } 1012 #ifndef TARGET_ABI32 1013 /* enable 64 bit mode if possible */ 1014 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) { 1015 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n"); 1016 exit(1); 1017 } 1018 env->cr[4] |= CR4_PAE_MASK; 1019 env->efer |= MSR_EFER_LMA | MSR_EFER_LME; 1020 env->hflags |= HF_LMA_MASK; 1021 #endif 1022 1023 /* flags setup : we activate the IRQs by default as in user mode */ 1024 env->eflags |= IF_MASK; 1025 1026 /* linux register setup */ 1027 #ifndef TARGET_ABI32 1028 env->regs[R_EAX] = regs->rax; 1029 env->regs[R_EBX] = regs->rbx; 1030 env->regs[R_ECX] = regs->rcx; 1031 env->regs[R_EDX] = regs->rdx; 1032 env->regs[R_ESI] = regs->rsi; 1033 env->regs[R_EDI] = regs->rdi; 1034 env->regs[R_EBP] = regs->rbp; 1035 env->regs[R_ESP] = regs->rsp; 1036 env->eip = regs->rip; 1037 #else 1038 env->regs[R_EAX] = regs->eax; 1039 env->regs[R_EBX] = regs->ebx; 1040 env->regs[R_ECX] = regs->ecx; 1041 env->regs[R_EDX] = regs->edx; 1042 env->regs[R_ESI] = regs->esi; 1043 env->regs[R_EDI] = regs->edi; 1044 env->regs[R_EBP] = regs->ebp; 1045 env->regs[R_ESP] = regs->esp; 1046 env->eip = regs->eip; 1047 #endif 1048 1049 /* linux interrupt setup */ 1050 #ifndef TARGET_ABI32 1051 env->idt.limit = 511; 1052 #else 1053 env->idt.limit = 255; 1054 #endif 1055 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1), 1056 PROT_READ|PROT_WRITE, 1057 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1058 idt_table = g2h(env->idt.base); 1059 set_idt(0, 0); 1060 set_idt(1, 0); 1061 set_idt(2, 0); 1062 set_idt(3, 3); 1063 set_idt(4, 3); 1064 set_idt(5, 0); 1065 set_idt(6, 0); 1066 set_idt(7, 0); 1067 set_idt(8, 0); 1068 set_idt(9, 0); 1069 set_idt(10, 0); 1070 set_idt(11, 0); 1071 set_idt(12, 0); 1072 set_idt(13, 0); 1073 set_idt(14, 0); 1074 set_idt(15, 0); 1075 set_idt(16, 0); 1076 set_idt(17, 0); 1077 set_idt(18, 0); 1078 set_idt(19, 0); 1079 set_idt(0x80, 3); 1080 1081 /* linux segment setup */ 1082 { 1083 uint64_t *gdt_table; 1084 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES, 1085 PROT_READ|PROT_WRITE, 1086 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1087 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1; 1088 gdt_table = g2h(env->gdt.base); 1089 #ifdef TARGET_ABI32 1090 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1091 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1092 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1093 #else 1094 /* 64 bit code segment */ 1095 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1096 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1097 DESC_L_MASK | 1098 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1099 #endif 1100 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff, 1101 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1102 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); 1103 } 1104 1105 cpu_x86_load_seg(env, R_CS, __USER_CS); 1106 cpu_x86_load_seg(env, R_SS, __USER_DS); 1107 #ifdef TARGET_ABI32 1108 cpu_x86_load_seg(env, R_DS, __USER_DS); 1109 cpu_x86_load_seg(env, R_ES, __USER_DS); 1110 cpu_x86_load_seg(env, R_FS, __USER_DS); 1111 cpu_x86_load_seg(env, R_GS, __USER_DS); 1112 /* This hack makes Wine work... */ 1113 env->segs[R_FS].selector = 0; 1114 #else 1115 cpu_x86_load_seg(env, R_DS, 0); 1116 cpu_x86_load_seg(env, R_ES, 0); 1117 cpu_x86_load_seg(env, R_FS, 0); 1118 cpu_x86_load_seg(env, R_GS, 0); 1119 #endif 1120 #elif defined(TARGET_SPARC) 1121 { 1122 int i; 1123 env->pc = regs->pc; 1124 env->npc = regs->npc; 1125 env->y = regs->y; 1126 for(i = 0; i < 8; i++) 1127 env->gregs[i] = regs->u_regs[i]; 1128 for(i = 0; i < 8; i++) 1129 env->regwptr[i] = regs->u_regs[i + 8]; 1130 } 1131 #else 1132 #error unsupported target CPU 1133 #endif 1134 1135 if (gdbstub) { 1136 gdbserver_start(gdbstub); 1137 gdb_handlesig(cpu, 0); 1138 } 1139 cpu_loop(env); 1140 /* never exits */ 1141 return 0; 1142 } 1143